INVT Goodrive350-19 Series Operation Manual page 85

Goodrive350-19 series VFD for crane
FWD/REV
running
command
Set
frequency
End frequency for
exiting I/F mode
(P04.50)
Starting frequency
for exiting I/F
mode (P04.44)
Output
frequency
I/F FWD/REV
current setting
(P04.41/P04.52)
Torque verification
current
(P90.12/P90.13)
Output current
Brake
opening
command
Brake action
Brake
feedback
8. Adjust braking comfortability, which can be implemented by using the following methods.
A. In I/F mode, you can decrease the brake release frequency and brake closing frequency and
adjust the T1–T8 delay parameters in the timing sequence so that the impact is reduced. Note that
the brake release frequency and brake closing frequency are greater than P01.01 (Starting frequency)
and P01.15 (Stop speed) in most cases.
B. During the reverse-running stop, you can apply the forward torque, that is, for reverse-running start,
you can perform forward brake release and then perform reverse running; for reverse-running stop,
you can switch reverse running to forward running, close the brake, and then perform forward-running
stop. This ensures there is no slip is felt during reverse start or stop. Forward torque is enabled by
setting P90.05. The timing sequence is as follows:
Space voltage vector control mode
T1/T5 T2/T6
Torque
verifying is
OK
Close
Close
T1: Delay before forward brake release P90.20 T3: Delay before forward brake closing P90.24
T2: Delay after forward brake release P90.22
T5: Delay before reverse brake release P90.21 T7: Delay before reverse brake closing P90.25
T6: Delay after reverse brake release P90.23
FWD/REV brake
FWD/REV
closing frequency
brake
P90.16/
release
P90.17
frequency
Release
Open
T4: Delay after forward brake closing P90.26
T8: Delay after reverse brake closing P90.27
-73-
Commissioning guidelines
T3/T7 T4/T8
P90.18/
P90.19
Close
Close